Equilateral Dispersion Prism from China
An equilateral prism typically made of flint glass used for dispersing white light into its spectral components in spectrophotometers and educational optics kits. Classified under HTS 9001.90.50.00 as an unmounted optical element specifically engineered for chromatic dispersion. Provides high dispersion for separating wavelengths in analytical instruments.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide dispersion curve data and Abbe number specifications to confirm classification as optical prism rather than common glass
• Label with material type (BK7, F2 flint glass) and coating specifications if applicable
• Include test reports verifying surface flatness and optical performance to prevent reclassification